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267 lines
8.8 KiB
267 lines
8.8 KiB
/**************************************************************************** |
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* fs/nxffs/nxffs_reformat.c |
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* |
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* Copyright (C) 2011 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* References: Linux/Documentation/filesystems/romfs.txt |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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/**************************************************************************** |
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* Included Files |
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****************************************************************************/ |
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#include <nuttx/config.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <debug.h> |
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#include <nuttx/mtd.h> |
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#include "nxffs.h" |
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/**************************************************************************** |
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* Pre-processor Definitions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Types |
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****************************************************************************/ |
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/**************************************************************************** |
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* Public Variables |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Name: nxffs_format |
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* |
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* Description: |
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* Erase and reformat the entire volume. |
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* |
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* Input Parameters: |
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* volume - Describes the NXFFS volume to be reformatted. |
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* |
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* Returned Value: |
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* Zero on success or a negated errno on a failure. Failures will be |
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* returned n the case of MTD reported failures o. |
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* Nothing in the volume data itself will generate errors. |
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* |
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****************************************************************************/ |
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static int nxffs_format(FAR struct nxffs_volume_s *volume) |
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{ |
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FAR uint8_t *blkptr; /* Pointer to next block data */ |
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off_t eblock; /* Erase block number */ |
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off_t lblock; /* Logical block number */ |
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ssize_t nxfrd; /* Number of blocks transferred */ |
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int i; |
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int ret; |
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/* Create an image of one properly formatted erase sector */ |
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memset(volume->pack, CONFIG_NXFFS_ERASEDSTATE, volume->geo.erasesize); |
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for (blkptr = volume->pack, i = 0; |
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i < volume->blkper; |
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blkptr += volume->geo.blocksize, i++) |
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{ |
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FAR struct nxffs_block_s *blkhdr = (FAR struct nxffs_block_s*)blkptr; |
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memcpy(blkhdr->magic, g_blockmagic, NXFFS_MAGICSIZE); |
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blkhdr->state = BLOCK_STATE_GOOD; |
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} |
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/* Erase and format each erase block */ |
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for (eblock = 0; eblock < volume->geo.neraseblocks; eblock++) |
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{ |
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/* Erase the block */ |
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ret = MTD_ERASE(volume->mtd, eblock, 1); |
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if (ret < 0) |
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{ |
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fdbg("Erase block %d failed: %d\n", eblock, ret); |
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return ret; |
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} |
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/* Write the formatted image to the erase block */ |
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lblock = eblock * volume->blkper; |
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nxfrd = MTD_BWRITE(volume->mtd, lblock, volume->blkper, volume->pack); |
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if (nxfrd != volume->blkper) |
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{ |
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fdbg("Write erase block %d failed: %d\n", lblock, nxfrd); |
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return -EIO; |
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} |
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} |
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return OK; |
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} |
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/**************************************************************************** |
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* Name: nxffs_badblocks |
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* |
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* Description: |
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* Verify each block and mark improperly erased blocks as bad. |
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* |
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* Input Parameters: |
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* volume - Describes the NXFFS volume to be reformatted. |
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* |
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* Returned Value: |
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* Zero on success or a negated errno on a failure. Failures will be |
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* returned n the case of MTD reported failures o. |
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* Nothing in the volume data itself will generate errors. |
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* |
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****************************************************************************/ |
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static int nxffs_badblocks(FAR struct nxffs_volume_s *volume) |
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{ |
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FAR uint8_t *blkptr; /* Pointer to next block data */ |
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off_t eblock; /* Erase block number */ |
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off_t lblock; /* Logical block number */ |
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ssize_t nxfrd; /* Number of blocks transferred */ |
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bool good; /* TRUE: block is good */ |
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bool modified; /* TRUE: The erase block has been modified */ |
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int i; |
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/* Read and verify each erase block */ |
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for (eblock = 0; eblock < volume->geo.neraseblocks; eblock++) |
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{ |
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/* Read the entire erase block */ |
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lblock = eblock * volume->blkper; |
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nxfrd = MTD_BREAD(volume->mtd, lblock, volume->blkper, volume->pack); |
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if (nxfrd != volume->blkper) |
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{ |
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fdbg("Read erase block %d failed: %d\n", lblock, nxfrd); |
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return -EIO; |
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} |
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/* Process each logical block */ |
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modified = false; |
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for (blkptr = volume->pack, i = 0; |
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i < volume->blkper; |
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blkptr += volume->geo.blocksize, i++) |
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{ |
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FAR struct nxffs_block_s *blkhdr = (FAR struct nxffs_block_s*)blkptr; |
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/* Check block header */ |
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good = true; |
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if (memcmp(blkhdr->magic, g_blockmagic, NXFFS_MAGICSIZE) != 0 || |
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blkhdr->state != BLOCK_STATE_GOOD) |
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{ |
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good = false; |
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} |
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/* Check that block data is erased */ |
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else |
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{ |
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size_t blocksize = volume->geo.blocksize - SIZEOF_NXFFS_BLOCK_HDR; |
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size_t erasesize = nxffs_erased(&blkptr[SIZEOF_NXFFS_BLOCK_HDR], blocksize); |
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good = (blocksize == erasesize); |
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} |
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/* If the block is bad, attempt to re-write the block header indicating |
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* a bad block (of course, if the block has failed, this may not be |
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* possible, depending upon failure modes. |
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*/ |
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if (!good) |
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{ |
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memcpy(blkhdr->magic, g_blockmagic, NXFFS_MAGICSIZE); |
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blkhdr->state = BLOCK_STATE_BAD; |
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modified = true; |
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} |
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} |
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/* If the erase block was modified, then re-write it */ |
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nxfrd = MTD_BWRITE(volume->mtd, lblock, volume->blkper, volume->pack); |
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if (nxfrd != volume->blkper) |
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{ |
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fdbg("Write erase block %d failed: %d\n", lblock, nxfrd); |
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return -EIO; |
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} |
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} |
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return OK; |
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} |
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/**************************************************************************** |
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* Public Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Name: nxffs_reformat |
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* |
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* Description: |
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* Erase and reformat the entire volume. Verify each block and mark |
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* improperly erased blocks as bad. |
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* |
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* Input Parameters: |
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* volume - Describes the NXFFS volume to be reformatted. |
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* |
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* Returned Value: |
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* Zero on success or a negated errno on a failure. Failures will be |
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* returned n the case of MTD reported failures o. |
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* Nothing in the volume data itself will generate errors. |
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* |
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****************************************************************************/ |
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int nxffs_reformat(FAR struct nxffs_volume_s *volume) |
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{ |
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int ret; |
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/* Erase and reformat the entire volume */ |
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ret = nxffs_format(volume); |
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if (ret < 0) |
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{ |
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fdbg("Failed to reformat the volume: %d\n", -ret); |
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return ret; |
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} |
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/* Check for bad blocks */ |
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ret = nxffs_badblocks(volume); |
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if (ret < 0) |
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{ |
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fdbg("Bad block check failed: %d\n", -ret); |
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} |
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return ret; |
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}
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